Physics with stopped beams at TRIP-TRAP Facility. P.D. Shidling Cyclotron Institute, Texas A&M University
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1 Physics with stopped beams at TRIP-TRAP Facility P.D. Shidling Cyclotron Institute, Texas A&M University
2 Physics with stopped beams Experiments require high purity low energy ions for studying various aspects of atomic and sub-atomic physics
3 Physics with stopped beams Experiments require high purity low energy ions for studying various aspects of atomic and sub-atomic physics Some decay correlations Mass measurements Laser spectroscopy Decay spectroscopy Isotope shift......
4 Physics with stopped beams Experiments require high purity low energy ions for studying various aspects of atomic and sub-atomic physics Some decay correlations Mass measurements Laser spectroscopy Decay spectroscopy Isotope shift Test of Standard Model (SM) at low energies generally refer to tests of the under lying fundamental symmetries.
5 Requirements: High purity beams of beta emitters. High Intensity beams of beta emitters.
6 Requirements: High purity beams of beta emitters. High Intensity beams of beta emitters. Nuclear Beta decay test of SM
7 Requirements: High purity beams of beta emitters. High Intensity beams of beta emitters. Nuclear Beta decay test of SM T =2 Superallowed transition
8 Requirements: High purity beams of beta emitters. High Intensity beams of beta emitters. Nuclear Beta decay test of SM T =2 Superallowed transition Physics Goal at TRIP-TRAP facility
9 Nuclear Beta decay test of SM Conserved Vector Current (CVC) hypothesis.
10 Nuclear Beta decay test of SM Conserved Vector Current (CVC) hypothesis. Correlation experiments? =
11 Nuclear Beta decay test of SM Conserved Vector Current (CVC) hypothesis. Correlation experiments? = Test of unitarity of CKM Matrix?
12 Superallowed transition Approaches
13 Superallowed transition Nuclear mirror transition Approaches Neutron lifetime and decay studies (no nuclear corrections) }
14 Superallowed transition Nuclear mirror transition Neutron lifetime and decay studies (no nuclear corrections) Pion Decay Approaches }
15 t 1/2 0 +, 1 0 +, 1 BR EXPERIMENT Q EC
16 Superallowed transition t 1/2 0 +, 1 (Including Radiative Corrections) 0 +, 1 BR EXPERIMENT Q EC
17 Superallowed transition t 1/2 0 +, 1 (Including Radiative Corrections) Mirror transition 0 +, 1 BR EXPERIMENT Q EC Z dependent radiative correction nuclear structure dependent radiative correction Isospin symmetry breaking correction Vector coupling constant transition independent radiative correction ratio of Gammow-Teller to Fermi mixing ratio
18 Superallowed transition t 1/2 0 +, 1 (Including Radiative Corrections) 0 +, 1 BR EXPERIMENT Q EC Mirror transition From many transitions Z dependent radiative correction nuclear structure dependent radiative correction Isospin symmetry breaking correction Vector coupling constant transition independent radiative correction ratio of Gammow-Teller to Fermi mixing ratio
19 Superallowed transition t 1/2 0 +, 1 (Including Radiative Corrections) 0 +, 1 BR EXPERIMENT Q EC Mirror transition From many transitions Z dependent radiative correction nuclear structure dependent radiative correction Isospin symmetry breaking correction Vector coupling constant transition independent radiative correction ratio of Gammow-Teller to Fermi mixing ratio Test of Conserved Vector Current Hypothesis (CVC)
20 Superallowed transition t 1/2 0 +, 1 (Including Radiative Corrections) 0 +, 1 BR EXPERIMENT Q EC Mirror transition From many transitions Z dependent radiative correction nuclear structure dependent radiative correction Isospin symmetry breaking correction Vector coupling constant transition independent radiative correction ratio of Gammow-Teller to Fermi mixing ratio Test of Conserved Vector Current Hypothesis (CVC)
21 Current Status
22 Current Status Superallowed transitions (T =1) J.C. Hardy and I.S. Towner Phys. Rev. C 79, (2009) = ± 0.79 s
23 Current Status Superallowed transitions (T =1) J.C. Hardy and I.S. Towner Phys. Rev. C 79, (2009) = ± 0.79 s CVC hypothesis verified to %
24 Current Status Superallowed transitions (T =1) Mirror transitions (T = 1/2 ) O. Naviliat-Cuncic and N. Severijns Phys. Rev. Lett. 142, (2009) J.C. Hardy and I.S. Towner Phys. Rev. C 79, (2009) = ± 0.79 s CVC hypothesis verified to = 6173 ± 22 s CVC hypothesis verified to % 0.36 %
25 Current Status Superallowed transitions (T =1) Mirror transitions (T = 1/2 ) V ud = ± V ud = ± V ud = ± (Superallowed transition ) (Mirror transitions) (Neutron decay) O. Naviliat-Cuncic and N. Severijns Phys. Rev. Lett. 142, (2009) J.C. Hardy and I.S. Towner Phys. Rev. C 79, (2009) = ± 0.79 s CVC hypothesis verified to = 6173 ± 22 s CVC hypothesis verified to % 0.36 %
26 Current Status Superallowed transitions (T =1) Mirror transitions (T = 1/2 ) V ud = ± V ud = ± V ud = ± (Superallowed transition ) (Mirror transitions) (Neutron decay) CKM unitarity satisfied to within an uncertainty of 0.06%. O. Naviliat-Cuncic and N. Severijns Phys. Rev. Lett. 142, (2009) J.C. Hardy and I.S. Towner Phys. Rev. C 79, (2009) = ± 0.79 s CVC hypothesis verified to = 6173 ± 22 s J.C. Hardy and I.S. Towner Phys. Rev. C 79, (2009) O. Naviliat-Cuncic and N. Severijns Phys. Rev. Lett. 142, (2009) CVC hypothesis verified to % 0.36 %
27 Current Status Superallowed transitions (T =1) Mirror transitions (T = 1/2 ) V ud = ± V ud = ± V ud = ± J.C. Hardy and I.S. Towner Phys. Rev. C 79, (2009) = ± 0.79 s (Superallowed transition ) (Mirror transitions) (Neutron decay) CKM unitarity satisfied to within an uncertainty of 0.06%. Nuclear independent radiative corrections Model dependence c seem to depend on T Need to verify experimentally O. Naviliat-Cuncic and N. Severijns Phys. Rev. Lett. 142, (2009) = 6173 ± 22 s J.C. Hardy and I.S. Towner Phys. Rev. C 79, (2009) O. Naviliat-Cuncic and N. Severijns Phys. Rev. Lett. 142, (2009) CVC hypothesis verified to CVC hypothesis verified to % 0.36 %
28 TRIP-TRAP MENU Measurement of value for T =2 superallowed transitions. - correlation measurement Testing the unitarity of CKM matrix
29 Why T = 2?
30 T = 2 Why T = 2?
31 Why T = 2? T = 2 Large correction is predicted for 32 Ar(T = 2 transition) Measurements will allow to test and verify these corrections.
32 Why T = 2? T = 2 Large correction is predicted for 32 Ar(T = 2 transition) Measurements will allow to test and verify these corrections. New cases for V ud 40 Ti 36 Ca 32 Ar 28 S 24 Si 20 Mg Beta delayed proton decay
33 Start of Program with 32 Ar
34 Start of Program with 32 Ar M. Bhattacharya et al. Phys. Rev. C 77, (2008) E p (MeV)
35 Start of Program with 32 Ar M. Bhattacharya et al. Phys. Rev. C 77, (2008) E p (MeV) (1) Measured the proton branch at 0.7% level. (2) Largest background in the spectrum comes from the betas that were not followed by delayed proton.
36 - correlation measurements 0 +, 2 32 Ar 0 +, 2 31 S + p 32 Cl
37 - correlation measurements Proton contain the information about 32 Cl recoil 0 +, 2 32 Ar 0 +, 2 31 S + p 32 Cl
38 - correlation measurements Proton contain the information about 32 Cl recoil 0 +, 2 32 Ar Vector Scalar 0 +, 2 31 S + p 32 Cl Adelberger E.G. et al. Phys. Rev. Lett (1999)
39 - correlation measurements Proton contain the information about 32 Cl recoil 0 +, 2 0 +, 2 32 Ar Vector Scalar 31 S + p 32 Cl Precision level can be improved and the background can be reduced by performing the measurement using ion trap (with open geometry). Adelberger E.G. et al. Phys. Rev. Lett (1999)
40 32 Ar Open geometry PSD Beta (E = 10 MeV; r larmor = 5 mm) PSD
41 32 Ar Open geometry PSD Beta (E = 10 MeV; r larmor = 5 mm) PSD Proton (E p = 4 MeV ; r larmor = 40 mm)
42 32 Ar Open geometry PSD Beta (E = 10 MeV; r larmor = 5 mm) PSD Proton (E p = 4 MeV ; r larmor = 40 mm) Different Larmor radii provides better separation. Comparison of parallel vs. opposite direction of proton w.r.t. beta may enhance the sensitivity.
43 Cyclotron Institute facility
44 Cyclotron Institute upgrade Recommisioning the K150 (88 ) cyclotron Constructing light & heavy ion guides
45 Beam for TRIP-TRAP Facility Useful nuclear reactions RIB production Charge-exchange Fusion-evaporation Projectile fragmentation Beam from K150 Cyclotron
46 Beam for TRIP-TRAP Facility Useful nuclear reactions Heavy Ion Guide Charge-exchange Fusion-evaporation Projectile fragmentation RIB Projectile Target Beam Energy (MeV/u) Production Rate (particles/s) Beam from K150 Cyclotron 40 Ti 36 Ca 32 Ar 28 S 24 Si 20 Mg 40 Ca 36 Ar 32 S 28 Si 24 Mg 20 Ne 3 He 3 He 3 He 3 He 3 He 3 He ~ ~ ~ ~ ~ ~
47 Heavy Ion guide beam line coupling to TRIP-TRAP Facility TRIP-TRAP
48 Gas Catcher RF Cone Forces RF + DC + Gas flow Efficient extraction of Ions In collaboration with Prof. Guy Savard - ANL
49 Alternative Ion Catcher 21 Na KVI, University of Groningen, The Netherlands 20 Na P.D. Shidling et al. NIMA 622 (2010) E. Traykov et al. NIMB 266 (2008) t 1/2 = s ( 21 Na) ; t 1/2 = s ( 20 Na) High efficiency for alkaline and alkaline-earth metal. Extreme temperatures. Efficiency is element dependent.
50 TRIP-TRAP facility
51 TRIP-TRAP facility
52 RFQ Segmented RFQ Total Length = 700 mm He Pressure = 1 X10-2 mbar Simulation results Time spread = 1.4 µs Energy spread = 7 ev
53 RFQ Segmented RFQ Total Length = 700 mm He Pressure = 1 X10-2 mbar Simulation results Time spread = 1.4 µs Energy spread = 7 ev Penning Trap Cylindrical Penning trap with open geometry allows one to carry out correlation measurement and mass measurement. Purification trap will be used for mass measurement (Geometry similar to SHIP TRAP) 7T magnet with 210 mm diameter.
54 TRIP-TRAP facility Take home points Low energy physics refers to the test of fundamental symmetries. Ion catcher could be an alternative. T=2 super allowed transition Test of CVC hypothesis Test of CKM unitarity Test C - NS to verify and improve calculations Good separation of the background using ion traps. Rich Program at upcoming TRIP-TRAP facility. Happy to receive suggestions and expand the Collaboration Thank you
55 TRIP-TRAP facility P.D. Shidling Ion Trap Ben Fenker Atom trap M. Mehlmann Ion trap Spencer Behling Atom trap Dr. Dan Melconian Group Leader Thank you
56 Backup Slides
57 Penning Trap Details
58 Thermal Ionzier Rb Ra
59
60 V ud = ± Pion Decay Mirror transition
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